- Module Size: Unit module's width.
- Symbol Size: One barcode symbol's width.
- Image Size: According to QuickMark specification, every side of symbol must keep 4 units module width white block (Quiet Zone). Consequently, Generated barcode from QuickMark official site will keep 4 units module width white block every side.
To guarantee the printed barcode can be decoded correctly by mobile/machine, barcode's output module/symbol's size must be appointed before typesetting/printing. We determine the ability of the lens by distinguishing the module clearly with minimum size of the lens. The module is the smaller in size, the better the quality of the lens is. In other words, the smaller barcode can be outputted.
In order to accord with most cell-phone lens ability, Taiwan OMI@ makes and standardizes module size to 1.0mm. QuickMark Mobile has already surmounted this standard in the general 0.3M pixels cell-phone with no close up even the 0.8mm module size can easily decode.
With the progress of the hardware and popularity of close up lens, the necessary module size will be adjusted downwards constantly. This means bar code can be printed more and more smaller.
When user make mobile barcode in QuickMark DIY website, you will see the information Proposed print size. User can consult this form to make your favorite module size and can set the picture size in your own software.
Following is the sample of Microsoft Word. After user pastes a picture and double clicks the picture, user can set the size of the picture:
In Adobe PhotoShop, user can set directly set the image size. The unit is mm, and user must cancel the Resample to Keep image's quality:
If user use high-quality output equipment(high DPI), we advise you to use SVG format. If your editor doesn't support this format, please set bigger module in options and download format like PNG for use. What the user must pay attention to is that in general editor will adopt pixel shifting in order to enable blowing up images having better quality. This function should not be used while enlarging the bar code, it will cause the barcode blur.
Various kinds of enlarge printing state of pictures comparison:
High pixel bitmap or SVG format file. |
JPEG compress graphics excessively. |
Low pixel bitmap file. |
Low pixel bitmap file with pixel shifting. |
Not all high pixels lens have good ability to distinguish the barcode. General camera cell-phone is design for scenery. Even the high pixels cell-phone doesn't mean it has high decode ability if no close up.
Whether the shoot picture is good enough to distinguish according to the picture is clear enough.
Right picture explains why low pixels(100 pixel) with close up lens is better than high pixels(400pixel) with no close up lens.
If user want to test your lens ability, please click the left picture and down CapabilityTest.pdf file.
Print out with laser printer is a better choice. Please set paper size at A4.
| 
